It is important to know that pool pump motors are not manufactured by the pump manufacturer; the motor will usually be manufactured by AO Smith, Magnetek or Centurion. Your pump's motor should have a label or faceplate on it which includes the information you need to replace your pump motor. The most important categories to note will be the horsepower (hp), motor frame (fr), voltage and service factor (sf). Some labels will provide you with a model number and it will usually be listed as CR or CAT. 1 HP - Up Rated 115 / 230 Volts 14.8/7.4 amps Service Factor: 1.25 48Y Frame 48Y motor body diameter is 1/2" smaller than 56Y Square Flange (Face) 5/8" Threaded Shaft All copper windings Automatic thermal protection Stainless steel threaded shaft Double sealed ball bearings Replaces Jandy number R0339802 Replaces Pentair / PacFab / Purex number 355339 Replaces Sta-Rite number AE100ELL Cross Reference: A100ELL, C48B19B84, C48K2EB102, C48K2EB104, C48K2EM15, C48K2P104, C48K2PA104, C48K2PA104A1, C48K2PA104A3, C48K2PA105, C48K2PA105A1, C48K2PA105A2, C48K2PA105A7, USQ1102, B692, B853, B853SE, B853SM, C1245, 13557, 54003, 5KC38SN6084X, C48K2PA105C5, R0339802, 355339 When replacing your pool pump motor you should always replace the shaft seal as well. The shaft seal is a 2 part piece made of rubber, metal and ceramic and keeps water from entering the pump motor. It is located near the impeller at the end of the motor shaft. Shaft seals vary between pumps so be sure to order the appropriate shaft seal for your pump.?